Fuel burning boiler
Patent 4327672 Issued on May 4, 1982. Estimated Expiration Date: 
February 12, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 12, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3171388 Boiler for liquid or gaseous fuels Water heating boiler Boiler Steel heating boiler for liquid or gaseous fuels Patent #: 4192259 InventorApplicationNo. 06/120899 filed on 02/12/1980US Classes:122/136R, Horizontal122/136C, Horizontal-corrugated or finned122/367.1HEAT TRANSMITTERExaminersPrimary: Yuen, Henry C.Attorney, Agent or FirmInternational ClassesF24H 1/26 (20060101)F24H 1/22 (20060101) F24H 9/14 (20060101) Foreign Application Priority Data1979-02-19 DEAbstractA fuel burning boiler comprises a water holding shell of sheet steel having front and rear walls defining axially aligned openings. An insert body passes through the openings and is affixed thereto, the water being held between the shell and insert body. The insert body includes a cast iron casing providing a combustion chamber in the interior thereof, defining ducts for combustion gases of the fuel burnt in the combustion chamber and a smoke box at the rear wall and in communication with the ducts for receiving the combustion gases therefrom, and a sheet steel casing forming a skin over the cast iron casing and tightly fitting thereover. The sheet steel casing is fluid tightly connected with the front and rear walls of the shell around the rims of the opening therein. | |
